In a city as old and large as Rome, there's bound to be interesting nooks and crannies that fly under the radar. As it turns out, one of those semi-secret spots has been hiding right under the noses of millions of tourists — beneath the Trevi Fountain, to be exact.

Federica, the local tour guide behind the Instagram account @livevirtualguide, recently surprised her followers with a video showing the little-known Roman attraction that takes visitors to the area underneath the Trevi Fountain.